MRI:Biliary hamartomas are hypointense at T1-weighted MR imaging and hyperintense at T2-weighted imaging. If the echo time is increased at T2-weighted imaging, the signal intensity of these lesions increases further and approaches that of cerebrospinal fluid. Biliary hamartomas do not usually show contrast enhancement, although a peripheral enhancing rim has been described. This has been hypothesized as related to compressed surrounding normal liver parenchyma